Improvement in devices for finishing threads



UNITED STATES PATENT TOBIAS KOHN, OF HARTFORD, CONNECTICUT.

Specification forming part of Letters Patent No. 48,958, dated July 25,1865.

To all whom t may concern:

Be it known that I, ToBIAs KOEN, of Hartford, in the county of Hartfordand State of Connecticut, have made new and useful Improvements inDevices for Finishing Thread; and I do hereby declare the following tobe a full,clear,and exact description otthe nature, construction, andoperation ofthe same, reference being had to the accompanying drawings,making part of this specification, in which- Figure l is a plan oftheimprovement. Fig. 2 is a transverse section on the lineman, Fig.].

The same letters refer to corresponding parts in the two figures.

My invention consists in the peculiar form and position ofthe rollers ina traversing carriage, upon which rollers the thread is wrapped, so thatas the carriage is reciprocated longitudinally the fuzz or loose liberis removed by friction and pressure, givinga smooth and iinishedappearance to the thread.

To enable one skilled in the branch ot' manufacture to which myinvention is allied toconstruct and use the saine, l will proceed todescribeit.

A is a carriage provided with l ins B, which are inserted into the sidesof the carriage in such a manner as to cross each other, viewing thedevice in end elevation or in the trailsverse section, Fig. 2. On thesepins are loose rollers, C, of a concave shape, which move l'reely underthe impulse of the thread or cord, which, being inserted through theguides D at each end,is wrapped once around each roller ofthe series, asshown in Fig. l. The thread being thus placed in position, the carriageis reciprocated longitudinally by any suitable means, whether by hand orby machine, and the etl'ect upon the thread is to wear off or rub downthe loosely-projecting liber, by which additional strength and beauty isattained.

l am aware thatthis mode ot'tinishingthread is not new, as the same hasbeen done by cylindrical rollers and by a large needle operatedV byhand; but in my improvement the rollers are concave on their faces, soas to cause the thread to chafe against itself in its passage round therollers, which it would not be compelled to do were the rollerscylindrical. The

concave form, by giving the point of greatest depression the smallestdiameter, causes the thread to slip naturally into it as the tension isapplied from either direction, and thus the threads bear against eachother.

Another point of improvement consists in mounting the rollers on axes,each of which is at right angles to the one next in series. The tendencyot the thread as it traverses upon the roller is to graduallyinove'toward one end or the other, according to the direction in whichit is rotating. By placing the adjacent axes at right angles they tendto correct this tendency in each other, as the deflection caused by thustraversing longitudinally on the roller is at right angles to the axisof the next roller, and consequently in a direction in which it cannotgive way to accommodate the said deileclion. It is thus restrainedwithin limilsof oscillation on either side of a central line parallel tothe length ofthe carriage, and passing through each oneot' the rollersand through the openings in the guides. Thus, as I have said, the twoobjects are secured-one to cause the thread to chafe against itself, andthe other to keep it within due bounds on the rollers. The pins carryingthe rollers, being attached at but one end to the carriage, ali'ord aready. means ot' placing the thread upon the rollers.

Having thus described my invention, what I claim therein as new, anddesire to secure by Letters Patent, is

l. The described concave faced rollers on which to wrap the thread to benished by the longitudinal motion ot the carriage on which the rollersare mounted.

2. Placing the alternate rollers ou axes at, or nearly at, right anglesto cach other, so as to partially counteract the tendency ot' the threadto traverse lengthwise of the rollers.

The above specilication of my improved device for cleaning and finishingthread and other articles, signed this 15th day of June, 1865.

TOBIAS KOHN.

